LM3485是TI公司的一款控制器（外部开关）产品，LM3485是4.5-35V、滞后非同步 PFET 降压控制器，本页介绍了LM3485的产品说明、应用、特性等，并给出了与LM3485相关的TI元器件型号供参考。
LM3485 - 4.5-35V、滞后非同步 PFET 降压控制器 - 控制器（外部开关） - DC/DC开关稳压器 - TI公司（Texas Instruments，德州仪器）
The LM3485 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, low cost, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple.
Current limit protection is provided by measuring the voltage across the PFET’s RDS(ON), thus eliminating the need for a sense resistor. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.
- Easy to Use Control Methodology
- No Control Loop Compensation Required
- 4.5V to 35V Wide Input Range
- 1.242V to VIN Adjustable Output Range
- High Efficiency 93%
- ±1.3% (±2% Over Temp) Internal Reference
- 100% Duty Cycle
- Maximum Operating Frequency > 1MHz
- Current Limit Protection
- VSSOP-8
